NDLI: Novel decimators and interpolators using computationally efficient halfband subfilters

Content Provider	IEEE Xplore Digital Library
Author	Estola, K.-P.
Copyright Year	1988
Description	Author affiliation: Tech. Res. Center of Finland, Tampere, Finland (Estola, K.-P.)
Abstract	Digital decimators and interpolators are considered that makes use of a novel linear-phase halfband FIR (finite-impulse response) filter structure which has a highly reduced number of general multiplications per sample compared to conventional halfband FIR filters. The novel filter is based on subfilters whose filter coefficients are related to each other recursively. The structure allows also convenient means for adjusting the passband and stopband ripples in a wide range. It is shown that the novel subfilters can be used to implement computationally efficient multistage polyphase decimators and interpolators. Since the novel filter structure has a highly reduced number of general multipliers, it is ideal for the sharpening techniques of J.F. Kaiser and R.W. Hamming (1977) and for the variable cutoff filter constructs of A.V. Oppenheim et al. (1976). The composite halfband FIR filter obtained from the sharpening or frequency transformation methods can be implemented as a polyphase filter in the lower sampling rate, resulting in savings of the data storage.<>
Starting Page	1854
Ending Page	1857
File Size	331681
Page Count	4
File Format	PDF
ISSN	15206149
DOI	10.1109/ICASSP.1988.196984
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1988-04-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Finite impulse response filter Passband Signal sampling Digital filters Filter bank Frequency Filtering Narrowband Transfer functions Band pass filters
Content Type	Text
Resource Type	Article

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